A back-to-back integrated stove air duct system based on bionic flow control and its application

Abstract

The present invention belongs to the field of bionic flow control technology, and discloses a back-to-back integrated stove air duct system based on bionic flow control and its application. The back-to-back integrated stove air duct system based on bionic flow control includes: a whale tail fin bionic air inlet pipe, based on bionic rheology, using the imitation whale fin flow line to make various introduced fluid media flow in the pipe; a header, installed under the whale tail fin bionic air inlet pipe, using the same outlet diameter and the middle contraction structure to further guide the flow of the fluid medium; a fan section, using the drainage power generated by the fan installed inside to introduce the fluid medium into the whale tail fin bionic air inlet pipe and the header; an outlet elbow, using the structure with the outer contour line of different arc lines to discharge the fluid medium generated by the fan section out of the pipe. The present invention reduces flow loss and local resistance, reduces eddy noise; the drag coefficient is greatly reduced, and the pressure loss of the outlet pipe is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of bionic flow control, and in particular relates to a back-to-back integrated stove air duct system based on bionic flow control and its application. Background Art

[0002] Bionics is a science and technology that imitates biological characteristics and uses biological structures and functions to develop machinery or various new technologies. The basic purpose of flow control technology is to reduce the flow resistance of objects in various fluid media. Domestic and foreign scholars have successfully applied novel ideas and technologies obtained from the study of aerial and marine organisms based on the concept of bionics to the field of flow control. Bionic flow control technology has involved research in various disciplines.

[0003] The wingtips of seabirds, the tail fins of fast-swimming fish, and the humpback whale pectoral fins with protruding front edges are all well-used in drag reduction. The oil smoke in the integrated stove is sucked in from the inlet, and the smoke is exhausted by side suction or deep suction and downward discharge according to the aerodynamic design principle. Due to the curvature effect of the exhaust pipe bend, Dean vortices may be generated in the pipe bend under certain conditions, causing changes in the velocity field and pressure field in the pipe. The generation of Dean vortices increases the energy loss caused by resistance during fluid movement.

[0004] Through the above analysis, the problems and defects of the prior art are as follows:

[0005] (1) The overall flow loss of the air duct in the prior art is relatively large.

[0006] (2) The prior art does not rely on CFD numerical simulation technology based on flow control technology, resulting in large resistance of various fluid media in the manufactured integrated stove air duct system, which affects the utilization rate. Summary of the invention

[0007] In view of the problems existing in the prior art, the present invention provides a back-to-back integrated stove air duct system based on bionic flow control and its application.

[0008] The present invention is implemented in this way: a back-to-back integrated stove air duct system based on bionic flow control comprises:

[0009] The whale tail fin bionic air inlet pipe is based on bionic fluidics and uses the whale fin-like flow lines to make the various fluid media introduced flow in the pipe;

[0010] The manifold is installed under the whale tail fin bionic air inlet pipe, and uses the consistent outlet diameter and the middle contraction structure to further guide the flow of the fluid medium;

[0011] The fan section uses the drainage power generated by the internal fan to introduce the fluid medium into the whale tail fin bionic air inlet pipe and collector;

[0012] The air outlet elbow uses a structure with an outer contour line of different arc lines to discharge the fluid medium generated by the fan section out of the pipeline.

[0013] Furthermore, the plane shape of the whale tail fin bionic air inlet duct is expressed by four parameters, and the four parameters include the root chord length c, the tip chord length b, the trailing edge angle α, and the trailing edge width t of the tail wing.

[0014] Furthermore, a positive value of the trailing edge angle α indicates a rearward sweep of the tail wing, and a negative value indicates a forward sweep of the tail wing.

[0015] Furthermore, the trailing edge angle α=90°, and the tip chord length b=0.

[0016] Further, the lower trailing edge line is (90mm≤c≤125mm).

[0017] Furthermore, the collecting pipe is a hollow rotating body.

[0018] Furthermore, a fan is installed inside the fan section, and the fan is a diagonal flow fan or an axial flow fan.

[0019] Furthermore, the curvature angle of the outer contour of the air outlet curved pipe decreases successively.

[0020] Another object of the present invention is to provide a design method for a back-to-back integrated stove air duct system based on bionic flow control, including: analyzing the flow characteristics in the pipe through computational fluid dynamics, and analyzing the velocity distribution and pressure distribution of Dean vortices in the pipe; and using computational fluid software to simulate the flow field in the curved pipe, selecting the flow velocity and pipe diameter parameters of the fluid experiment, and designing the internal structure of the integrated stove and the CFD calculation fitting curve of the guide component based on the selected flow velocity and pipe diameter parameters.

[0021] Another object of the present invention is to provide an integrated stove for households and public catering industries equipped with the back-to-back integrated stove air duct system based on bionic flow control.

[0022] Another object of the present invention is to provide an exhaust and dust purification device for electronic processing, chemical product manufacturing, and mechanical manufacturing industries, which is equipped with the back-to-back integrated stove air duct system based on bionic flow control.

[0023] In combination with the above technical solutions and the technical problems solved, please analyze the advantages and positive effects of the technical solutions to be protected by the present invention from the following aspects:

[0024] First, in view of the technical problems existing in the above-mentioned prior art and the difficulty in solving the problems, the technical solutions to be protected by the present invention and the results and data during the research and development process are closely combined to provide a detailed and profound technical effect. The specific description is as follows:

[0025] The present invention provides a back-to-back integrated stove air duct system based on bionic flow control, comprising a whale tail fin bionic air inlet duct, a collecting pipe, a fan section, and an air outlet bend; the plane shape of the whale tail fin bionic air inlet duct is expressed by four parameters, namely, the root chord length c of the tail wing, the tip chord length b, the trailing edge angle α (a positive value indicates a rearward sweep of the tail wing, and a negative value indicates a forward sweep of the tail wing), and the trailing edge width t; a fan is installed inside the fan section, and the fan is not limited to an oblique flow type; the traditional integrated stove air duct design is based on experiments and processing experience, and the overall flow loss of the air duct is large. Now, based on flow control technology and with the help of CFD numerical simulation technology, the present invention proposes a back-to-back integrated stove air duct system based on bionic flow control.

[0026] Second, considering the technical solution as a whole or from the perspective of the product, the technical effects and advantages of the technical solution to be protected by the present invention are described in detail as follows:

[0027] The device of the present invention is based on bionic flow control technology, imitating the flow line of whale fins, and is used for the shape design of the air inlet pipe in the back-to-back air duct, reducing flow loss and local resistance, and reducing eddy noise;

[0028] The CFD calculation results of the device of the present invention show that the local energy loss of turbulent kinetic energy is small, and it has a good flow guidance effect. Compared with ordinary air inlet pipes, the generation of internal vortices is greatly reduced;

[0029] The fan section in the device of the present invention can adopt an axial flow or oblique flow fan, which has the characteristics of good disassembly and sealing;

[0030] The air outlet curved pipe in the device of the present invention has a reduced curvature deflection angle, a better curvature than a traditional air outlet pipe, a greatly reduced resistance coefficient, and reduced pressure loss in the air outlet pipe.

[0031] Third, as auxiliary evidence of the inventiveness of the claims of the present invention, it is also reflected in the following important aspects:

[0032] (1) The expected benefits and commercial value of the technical solution of the present invention after transformation are as follows: The integrated stove market is developing rapidly and has become the third kitchen appliance product with a market size of over 10 billion. The utilization rate of its space determines the popularity of the product, which means whether more kitchenware products can be integrated. The air duct system provided by the patent of the present invention subverts the existing integrated stove layout design and provides ideas for the design of similar products in the future.

[0033] (2) The technical solution of the present invention fills the technical gap in the industry at home and abroad: the internal power component of the traditional integrated stove is a multi-blade centrifugal fan. The back-to-back integrated stove air duct system based on bionic flow in this patent reduces the space occupancy rate by about half, is equipped with a diagonal flow fan or other types of fans, and is more compact in structure.

[0034] (3) Whether the technical solution of the present invention solves the technical problems that people have been eager to solve but have never been able to solve: By using CFD numerical simulation research, the 90° strong bend design of the elbow in the traditional design is avoided, and an ideal curve suitable for the flow diversion of oil smoke is fitted, which greatly saves calculation time and calculation memory space and shortens the research cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] FIG1 is a schematic diagram of an air duct system of a back-to-back integrated stove based on bionic flow control provided by an embodiment of the present invention; FIG1(a) is a front view of the air duct system of a back-to-back integrated stove based on bionic flow control; FIG1(b) is a side view; and FIG1(c) is a top view;

[0036] Figure 2 It is a schematic diagram of a whale tail fin bionic air inlet pipe of a back-to-back integrated stove air duct system based on bionic flow control provided by an embodiment of the present invention;

[0037] Figure 3 This is a simulation diagram of the air duct system of a back-to-back integrated stove based on bionic flow control provided by an embodiment of the present invention;

[0038] Figure 4 It is a schematic diagram of the actual effect of the air duct system of the back-to-back integrated stove based on bionic flow control provided by an embodiment of the present invention;

[0039] In the figure: 1. Whale tail fin bionic air inlet duct; 2. Collecting pipe; 3. Fan section; 4. Air outlet elbow; c. Root chord length of tail wing; b. Tip chord length; α, trailing edge angle; t, trailing edge width; F(c), upper trailing edge line; G(c), lower trailing edge line. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0041] 1. Explanatory Examples In order to enable those skilled in the art to fully understand how to implement the present invention, this section provides an illustrative example that expands and describes the technical solution of the claims.

[0042] Example 1

[0043] As shown in FIG1 , an embodiment of the present invention provides a back-to-back integrated stove air duct system based on bionic flow control, comprising: a whale tail fin bionic air inlet pipe 1, a collecting pipe 2, a fan section 3, and an air outlet curved pipe 4.

[0044] The whale tail fin bionic air inlet duct 1 is based on bionic rheology and utilizes the whale fin-like flow lines to reduce the loss and local resistance of various fluid media introduced during flow, thereby reducing eddy current noise.

[0045] The manifold 2 is installed under the whale tail fin bionic air inlet 1, and the flow resistance of the fluid medium is further reduced by using the consistent outlet diameter and the middle contraction structure;

[0046] The fan section 3 uses the drainage power generated by the fan installed inside to introduce the fluid medium into the whale tail fin bionic air inlet pipe 1 and the collecting pipe 2;

[0047] The air outlet elbow 4 discharges the fluid generated by the fan section 3 by utilizing a structure in which the outer contour line is a non-concentric arc line.

[0048] Example 2

[0049] Based on the back-to-back integrated stove air duct system based on bionic flow control provided in Example 1, Figure 2 As shown, the plane shape of the whale tail fin bionic air inlet duct 1 is expressed by four parameters, namely, the root chord length c of the tail wing, the tip chord length b, the trailing edge angle α (positive value means the tail wing is swept back, negative value means the tail wing is swept forward), and the trailing edge width t.

[0050] Among them, the trailing edge angle α = 90°, b = 0, and the lower trailing edge line is (90mm≤c≤125mm).

[0051] Example 3

[0052] Based on the back-to-back integrated stove air duct system based on bionic flow control provided in Example 1, further, the collecting pipe 2 is a hollow rotating body with the inlet and outlet diameters of the same size and contraction in the middle; the collecting pipe 2 can reduce the flow resistance of the fluid medium and improve the total pressure and total pressure efficiency of the fan.

[0053] Example 4

[0054] Based on the back-to-back integrated stove air duct system based on bionic flow control provided in Example 1, further, the fan section 3 is internally equipped with a fan, and the fan is not limited to the oblique flow type. An axial flow fan can also be used, which has the characteristics of good detachability, sealing, etc.

[0055] Example 4

[0056] Based on the back-to-back integrated stove air duct system based on bionic flow control provided in Example 1, as shown in Figures 1, Figure 3 , Figure 4 As shown, further, the air outlet elbow 4 has an outer contour line of a non-concentric arc line and an inner contour radius R 1 =45mm, outer contour radius, R 2 =160mm. The curvature deflection angle of the air outlet bend 4 is reduced, and the curvature is better than the traditional air outlet duct, the resistance coefficient is greatly reduced, and the pressure loss of the air outlet bend is reduced. The curvature deflection angle of the air outlet bend 4 is normally 90° strong bend, and now the deflection angle is less than 90°. The principle is based on computational fluid dynamics, as shown in the cloud diagram shown in 3.

[0057] The direction of gas flow inside the device based on the above-mentioned embodiment is as follows: gas enters from the whale tail fin bionic air inlet pipe, passes through the collecting pipe, the fan section inhales the air flow, and is introduced into the air outlet elbow to flow out.

[0058] The embodiment of the present invention also provides a design method for a back-to-back integrated stove air duct system based on bionic flow control, including: by computational fluid dynamics, the flow characteristics in the pipe can be described more vividly, and the velocity distribution and pressure distribution of the Dean vortex in the pipe can be analyzed more directly. The flow field in the curved pipe is simulated by computational fluid software, which has a good reference value for the parameter selection of fluid experiments (such as flow velocity, pipe diameter, etc.). According to the CFD calculation results and experimental data, the local energy loss of turbulent kinetic energy is small, and it has a good diversion effect. Compared with ordinary air inlet pipes, the generation of internal vortices is greatly reduced. The overall structure is designed by combining the internal structure of the integrated stove, CFD calculation fitting of the guide component curve, and experiments.

[0059] 2. Application Examples: In order to prove the creativity and technical value of the technical solution of the present invention, this section provides application examples of the technical solution of the claims on specific products or related technologies.

[0060] Application Example 1

[0061] The back-to-back integrated stove air duct system based on bionic flow control provided by the above embodiment can be installed on integrated stoves in households and public catering industries.

[0062] Application Example 2

[0063] The back-to-back integrated stove air duct system based on bionic flow control provided by the above embodiment can be applied to exhaust and dust purification devices that require a higher environmental level in electronic processing, chemical product manufacturing, and machinery manufacturing industries.

[0064] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any modifications, equivalent substitutions and improvements made by any technician familiar with the technical field within the technical scope disclosed by the present invention and within the spirit and principle of the present invention should be covered by the protection scope of the present invention.

Claims

1. A back-to-back integrated stove air duct system based on bionic flow control, characterized in that: The back-to-back integrated stove air duct system based on bionic flow control includes: The whale tail fin bionic air inlet pipe is based on bionic fluidics and uses the whale fin-like flow lines to make the various fluid media introduced flow in the pipe; The manifold is installed under the whale tail fin bionic air inlet pipe, and uses the consistent outlet diameter and the middle contraction structure to further guide the flow of the fluid medium; The fan section uses the drainage power generated by the internal fan to introduce the fluid medium into the whale tail fin bionic air inlet pipe and collector; The outlet elbow uses a structure with an outer contour line of different arc lines to discharge the fluid medium generated by the fan section out of the pipeline; Trailing edge angle α = 90°, tip chord length b = 0; The lower trailing edge line is where c is the root chord length of the tail wing.

2. The back-to-back integrated stove air duct system based on bionic flow control according to claim 1, characterized in that: The plane shape of the whale tail fin bionic air inlet duct is expressed by four parameters, including the root chord length c, the tip chord length b, the trailing edge angle α, and the trailing edge width t of the tail fin.

3. The back-to-back integrated stove air duct system based on bionic flow control according to claim 2, characterized in that: The positive value of the trailing edge angle α indicates that the tail is swept backward, and the negative value indicates that the tail is swept forward.

4. The back-to-back integrated stove air duct system based on bionic flow control according to claim 1, characterized in that: The collecting pipe is a hollow rotating body.

5. The back-to-back integrated stove air duct system based on bionic flow control according to claim 1, characterized in that: A fan is installed inside the fan section, and the fan is a diagonal flow fan or an axial flow fan.

6. The back-to-back integrated stove air duct system based on bionic flow control according to claim 1, characterized in that: The curvature deflection angle of the outer contour line of the air outlet curved pipe decreases successively.

7. A design method for a back-to-back integrated stove air duct system based on bionic flow control as claimed in any one of claims 1 to 6, characterized in that: The design method of the back-to-back integrated stove air duct system based on bionic flow control includes: analyzing the flow characteristics in the pipe and the velocity distribution and pressure distribution of the Dean vortex in the pipe through computational fluid dynamics; and simulating the flow field in the curved pipe by using computational fluid software, selecting the flow velocity and pipe diameter parameters of the fluid experiment, and designing the internal structure of the integrated stove and the CFD calculation fitting curve of the guide component based on the selected flow velocity and pipe diameter parameters.

8. An integrated stove for household and public catering industry, characterized in that: The integrated stoves for households and public catering industries are equipped with the back-to-back integrated stove air duct system based on bionic flow control as described in any one of claims 1 to 6.

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